The job duties of a precision machinist revolve around working to set up, program, and operate a machine to create precision tools, products, or instruments. In this career, your responsibilities may include reading blueprints and obtaining measurements/geometric information to aid in the manufacturing of precision tools or devices. Your employer may ask you to set up and operate conventional machines or CNC machines for their precision machining projects. You may need to assemble machined parts and control the speed of the material feed and cutting during production.